How to tether your 3G iPhone for use as a modem

July 23, 2008 Although tethering, or using the phone as a modem for laptops, is a feature that is widely supported by almost all the 3G phones that have come out of market to date, AT&T have come out and said they will not support such a feature on the 3G iPhone. That oversight has spurred hackers into action and resulted in the circulation of a tutorial for doing what AT&T won’t. Remember that this might be against your use license agreement with AT&T and result in much unpleasantness – or they may do nothing at all.